Oil pump



C. E. JACOBS ET AL May 9, 1933.

OIL PUMP Filed Nov. 5, 1931 INVENTOR.

ATTORNEY.

Patented May 9, 1933 UNHTED STATES CLARENCE E.

PQRATION OF MICHIGAN I JACOBS AND ALFRED ZECH, OF DETROIT, MICHIGAN,ASEZIGNOEEi INDUSTRIAL HIE-E CLOTH "EEODUCTS CORPGRATION, OF WAYNE,I'v'IECHIG-AN, A COB- PATENT OFFICE OIL PUMP Application filed November7 The present invention relates to oil pumps for internal combustionengines, and more especially to 1 the screened inlets for such pumps. jj

V in the conventional practice, it is customary to provide a pump screenof rather large area and to place over the screen, and spaced somewhatfrom it, a bell which encases the sides and may extend to or below thelowest part of the screen to prevent quick clogging by solid particlesor by ice in winter. Difficulty has been experienced, however, 1nsecuring the bell over the screen by satlsfactory economical means.

Among the objects of the present invention is to overcome thisdifliculty and provide securing means not only permanent andsufficiently leakproof but low in cost as well.

Other objects will readily occur to those skilled in the art, uponreference to the following description and the accompanying drawing inwhich:

Fig. 1 is a more or less diagrammatic vlew,

with parts broken away, of an enginecrank case in side elevation,showing the use and location of the present device.

Fig. 2 isa vertical central section through the screen and bell inprocess of assembly.

Fig. 3 is a part of the same, showing the parts as assembled.

Fig. 4 is a section substantially on line 47-4 of Fig. 2 looking in thedirection of the arrows.

Fig. 5 is a partly sectional and partly side elevational View of thepump inlet pipe.

Fig. 6 is a section substantially on line 6-6 of Fig. 5 and looking inthe direction of the arrows, and

Fig. 7 is a detail plan view of a part of the securing means.

In the drawing the lower part of an internal combustion engine includinga crank case is shown in Fig. 1, with the crankcase and oil sumpindicated at 10. In the latter is arranged an oil pump 11 having asuitable delivery conduit (not shown) leading to the moving parts to belubricated.

The pump is shown as mounted upon or just above a screened inlet chamber12 from which 5, 1931. Serial No. 573,224.

comprises an inlet pipe 20- threaded at its upper end as at 21 forsecuring to the pump 11, and near its lower end provided with an annulargroove 22 which is deepened at two diametrically opposite portions toprovide flats 23. This inlet pipe 20 also forms the support for thescreen chamber and the screen 25.

The screen may be cup shaped as shown, and secured in any suitablefashion, open end up, within a bell 26 which in the form shown extendsto preferably just below the screen and is sufficiently larger than thesame to provide a space 27 around the sides of the screen. The shownmethod of securing the screen in place, consists in providing the innersurface of the hell with a shallow groove 28 near its top and the upperedge of the screen with a resilient ring 29 which expands into thegroove when forced thereinto.

The upper surface 34; of the bell 26 is formed, as indicated inFig. 2,with a central downwardly flanged opening 30 Very slightly greater thanthe outside diameter of pipe 20. I

Surrounding the opening 30 is a gasket seat 31 also formed of the metalof the bell as a rabbet surrounding the flange 30, to receive a suitablegasket 32. Surrounding and above the seat 31 is another flat shoulderportion 33a for receiving a split disc or washer 33, formed in twosubstantially semi-circular portions. The shoulder 33a is alsosufficiently below the top, ofthe bell to make the upper surface ofWasher 33 substantially flush with or slightly below or above thesurface 34. Around the shoulder portion 33a, the metal of the bell 26 isso formed as to provide an upstanding thrust through opening 30, gasket32 being in place, and the Washer 33 seated on the shoulder 33a Withinflange 35. The parts then occupy the position shown in Fig. 2.

After the parts are so assembled, the flange 35 is turned in, as shownin Fig. 3, upon the outer edge of the Washer 33, holding the parts inpermanently fixed relation.

In order to more definitely fix the parts against relative rotarymovement, the outer edges of Washer 33 may be notched as at 41 so thatsome of the metal of flange 35 may flow into the notches.

Vfhen the flange 35 has been turned doWn as shown, there is produced asubstantially liquid tight joint and one Which Will Withstand tle stressoccasioned by threading the pipe 20 into the pump housing.

It is contemplated to omit the gasket 32 and seat 31 and also thenotches 33, as under some conditions these may be found unnecessary.

Now having described the invention and the preferred embodiment thereof,it is to be understood that the said invention is to be limited, not tothe specific details herein set forth, but only by the scope of theclaims WlliCllfOllOWZ V I claim:

1. In a screened pump inlet, a screen, a bell covering said screen toform a pump inlet chamber, and a pump inlet conduit extending throughsaid bell into said chamber, means for mounting the bell upon saidconduit comprising an opening for said conduit, a seat surrounding saidopening, a metallic Washer on said seat means for fixing said Washeragainst longitudinal movement With respect to said conduit, and meansfor fixing said Washer upon said seat.

2. In a screened pump inlet, a screen, a bell covering saidscreen toform a pump inlet chamber, and a pump inlet conduit extending throughsaid bell into said chamber,

' means for mounting the bell upon said conduit comprising a splitWasher having a flat toned portion on its inner periphery, a peripheralchannel on said conduit adapted to receive said Washer, there being aflattened portion in said channel bottom to cooperate With said firstmentioned flattened portion, and means to fix said \VfiShOI to said bellagainst movement.

3. In a screened pump inlet having a screen, a bell covering said screento form a pump inlet chamber, and a pump inlet conduit extending throughsaid bell into said chamber, means for mounting the bell upon saidconduit comprising a split Washer having a flattened portion on itsinner periphery a'seat for said Washer concentric with the opening forsaid conduit, a peripheral chan' nel on said conduit adapted to receivesaid Washer, there being a flattened portion in said channel bottom tocooperate with said first mentioned flattened portion, and means to fixsaid Washer upon said seat.

l. In a screened pump inlet, a screen, a bell covering said screen toform a pump inlet chamber, and a pump inlet conduit extending upon saidWasher to thereby fix it against movement.

5. In a screened pump inlet, a screen,'a bell covering said screen toform a pump inlet chamber, and a pump inlet conduit extending throughsaid bell into said chamber, said conduit being provided With aperipheral channel of uneven depth ashort distance from its inlet end,and said bell having a suitable opening to receive said conduit, meansfor fixing said conduit insaid opening comprising a Washer having aninner periphery corresponding to the contour of the bottom of saidchannel and adapted to lie therein, a seat for said Washer around saidopening, and means for fixing said Washer upon said seat againstrotation or displacement.

6. In a screened pump inlet member, a screen, a bell partly coveringsaid screen to form an inlet chamber, and a pump inlet conduit extendingthrough the bell into said chamber, means for mounting the bell upon theconduit comprising an opening in the bell for said conduit, a seatsurrounding said opening, a metallic locking member on said seat andengaging the conduit, means for fixing said locking member againstlongitudinal and rotative movement with respect to the conduit, andmeansfor fixing said locking member upon the seat.

In testimony whereof, We sign this specification.

' CLARENCE E. JACOBS.

ALFRED ZECH.

